Accounting PoliciesAccounts receivableTotalTrade accounts payableDue from ManagerDue to ManagerAccrued revenueTotal Accrued RevenueAccrued liabilitiesTotalAccrued LiabilitiesAccumulated Depreciation, Depletion and Amortization, Property, Plant, and EquipmentAccumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Ending BalanceAccumulated Depreciation, Beginning BalanceAccumulated Depreciation, Ending BalanceAdditional paid in capitalAdditional Paid in CapitalAdjustments to reconcile net income to net cash provided by operating activities:Amortization and write-off of deferred finance chargesAmortization and write-off of deferred finance chargesHull 1718Assets held for saleAsset held for sale including discontinued operationsAssets held for saleASSETSFair value assets held for saleTotal assetsTotal assetsTotal current assetsTotal current assetsCURRENT ASSETS:FIXED ASSETS:Balance Sheet Location [Axis]Balance Sheet Location [Domain]Basis of Presentation and General InformationCash and cash equivalents at beginning of yearCash and cash equivalents at end of yearCash and cash equivalentsCash and Cash EquivalentsRestricted CashNet increase/(decrease) in cash and cash equivalentsNet increase/(decrease) in cash and cash equivalentsClass of Stock [Line Items]Class Of Stock [Domain]COMMITMENTS AND CONTINGENCIESCommitments and Contingencies DisclosureCommitments And Contingencies DisclosureCommon stock, $0.001 par value; 200,000,000 authorized, 83,450,266 and 83,486,194 issued and outstanding at December 31, 2014 and 2015, respectivelyOrdinary shares issuedCommon Stock, Discount on SharesOrdinary shares authorizedCommon Stock Dividends Per Share DeclaredOrdinary shares par valueCommon StockCommon Stock ACommon StockOrdinary shares outstandingConcentration Risk [Line Items]Concentration Risk Benchmark [Domain]Concentration Risk [Table]Charterer percentage in total revenueConcentration Risk By Benchmark [Axis]Principles of ConsolidationCrew wages and related costsEXPENSES:Credit Facility [Domain]Credit Facility [Axis]Preferred SharesDebt Instrument, Description of Variable Rate BasisDebt Instrument, Covenant ComplianceDebt Instrument [Line Items]Debt DisclosureDebt, Weighted Average Interest RateSchedule of Long-term Debt Instruments [Table]Debt Instrument, Covenant DescriptionCommencementDebt Instrument [Axis]Debt Disclosure [Text Block]Debt DisclosureMaturityDebt Instrument, Frequency of Periodic PaymentDebt Instrument Name [Domain]Debt Instrument, PriorityLong term debt, net of deferred fianncing costsRestricted cash releasedDecrease In Restricted CashDeferred Financing CostsDeferred financing costs non-currentDeferred Finance Costs, Noncurrent, Net , Beginning balanceDeferred Finance Costs, Noncurrent, Net , Closing balanceDeferred finance costsDeferred financing costsTotal deferred financing costsLess: Total deferred financing costsDeferred CostsCurrent portion of deferred financing costsDeferred Revenue Arrangement, by Type [Table]Deferred Revenue Arrangement Type [Axis]Deferred Revenue Arrangement Type [Domain]Deferred RevenueTotal Unearned RevenueUnearned revenueCurrent liabilityDeferred Revenue Arrangement [Line Items]Unearned revenue - Long-termNon-current liabilityTime deposits - Short termDepreciationDepreciationAccumulated DepreciationDerivative assets noncurrentDerivative assetsDerivative [Line Items]Fair Value of Financial Instruments and Derivative InstrumentsDerivative Assets, CurrentDerivative assetsDerivative, Maturity DateDerivative, Inception DateDerivative AssetsTotal DerivativesDerivative instruments- asset positionDerivative Instrument Risk [Axis]Derivative, Fixed Interest RateDerivative liabilities currentDerivative liabilitiesDerivative LiabilitiesTotal DerivativesDerivative instruments- liability positionDerivative liabilities noncurrrentDerivatives liabities - Long-termGain/(loss) on derivativesNet Gain/(Loss) RecognizedDerivative Contract Type [Domain]Derivative And Financial InstrumentsTaxesSpares, stores and provisionsAssets Held for SaleDividends Payable, Date to be PaidDividends Payable, Amount Per ShareDividends Payable, Date Of RecorddividendDividend declarationDividends(per preferred share)Preferred share dividendsDividends PayableDividendsCommon share dividendsEarnings Per Share [Policy Text Block]Earnings Per ShareEarnings/(loss) per share in U.S.Dollars, basic and dilutedEarnings Per Share [Text Block]Earnings Per ShareEarnings Per ShareEffect of exchange rate changes on cashEffective Income Tax Rate Reconciliation, at Federal Statutory Income Tax RateEquityEquity Component [Domain]Listing fees and expensesExtinguishment Of Debt AmountFair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Table]Assets Measured at Fair Value on a Non-recurring Basis [Line Items]Fair Value on a Non-recurring BasisMeasurement Frequency [Axis]Fair Value, Hierarchy [Axis]Fair Value, Measurements, Fair Value Hierarchy [Domain]Fair Value Assets Measured On Nonrecurring Basis Valuation Techniques [TextBlock]Asset Measured at Fair value on a Non-recuring BasisFair Value Measurement Frequency [Domain]Level 3Level 1Significant Other Observable Inputs (Level 2)Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table]Unrealized foreign exchange loss/(gain)Unrealized foreign exchange (gain)Foreign Currency TranslationForeign currency (loss)/gainForeign Exchange Forward ContractsGain on sale of assetsGain on sale of assetsInterst Rate ContractsEarly redelivery income/(cost), netGain (Loss) on Contract TerminationGain on loan write offGain on loan write offGeneral and Administrative ExpenseTotalGeneral and administrative expensesHedging Designation [Axis]Hedging Designation [Domain]Impairment and Disposal of Long-lived AssetsImpairment lossImpairment lossImpairment of Long-Lived Assets Held-for-useIncome Statement Location [Axis]Statement of Operations [Abstract]Income Statement Location [Domain]Increase in restricted cashIncrease in restricted cashAccounts receivableAccounts receivable trade varianceTrade accounts payableTrade accounts payable varianceDue from ManagerIncrease Decrease In Due From ManagerAccrued liabilitiesAccrued liabilities varianceDue to ManagerDue to Manager varianceUnearned revenueUnearned revenue varianceChange in:InventoriesInventories varianceAccrued revenueAccrued revenue variancePrepaid expenses and other current assetsPrepaid expenses and other current assets varianceInterest Costs, Capitalized During PeriodInterest expenseInterest expenseInterest Costs IncurredInterest Payable, CurrentInterest on long-term debtCash paid for interest (excluding capitalized interest):Current Interest Rate SwapInterest Rare SwapInventories Policy [Policy Text Block]InventoriesInventory [Line Items]Loss from inventory valuationInventory DisclosureInventoriesLoss from inventory valuationLoss from inventory valuationInventory [Table]Inventory valuationInvestment Owned, at Fair ValueInterest incomeTotal current liabilitiesTotal current liabilitiesLiability directly associated with assets held for saleCURRENT LIABILITIES:Total liabilitiesTotal liabilitiesLIABILITIES AND SHAREHOLDERS' EQUITYTotal liabilities and shareholders' equityTotal liabilities and shareholders' equityLine of Credit Facility [Table]Line Of Credit Facility Expiration Date 1Line of creditLine of Credit Facility, Maximum Borrowing CapacityLoan facility for full repayment of Maxdekatria, Glovertwo and ShikokutesseraLine Of Credit Facility Initiation Date 1Line of Credit Facility [Line Items]Line of Credit Facility, Frequency of Payment and Payment TermsLine of Credit Facility, Remaining Borrowing CapacityAccounts receivable trade disclosureLong-term Debt, Fair ValueTotal debtTotal debtDebt2019202020182021 and thereafterCurrent portion of Long-term debtCurent portion20162017InvestmentsLong-term debt, net of current portionLong-term debtMajor Customers [Axis]StaloMaximumMinimumName of Major Customer [Domain]Cash Flows from Financing Activities:Net income available to common shareholdersNet income/(loss) available to common shareholdersNet Cash Used in Investing ActivitiesNet Cash Used in Investing ActivitiesNet Cash Provided by Operating ActivitiesNet Cash Provided by Operating ActivitiesNet income/(loss)Net income/(loss)Cash Flows from Investing Activities:Cash Flows from Operating Activities:Net Cash (Used in)/Provided by Financing ActivitiesNet Cash Provided by/(Used in) Financing ActivitiesOther finance costsOTHER (EXPENSE)/INCOME:Derivatives not designated as hedging instrumentsCompensation for Directors and OfficersOperating Leases, Future Minimum Payments ReceivableTotalOperating Leases, Future Minimum Payments Receivable, in Four Years2019Operating Leases, Future Minimum Payments Receivable, in Two Years2017Operating Leases, Future Minimum Payments Receivable, ThereafterThereafterOperating incomeOperating income/(loss)Operating Leases, Future Minimum Payments Receivable, Current2016Vessel operating expensesVessel operating expensesTotalOperating Leases, Future Minimum Payments Receivable, in Five Years2020Operating Leases, Future Minimum Payments Receivable, in Three Years2018InsuranceNoncash Investing activitiesNon cash Investing and Financing activitiesOther fixed assets, netOther Fixed Assets, NetMiscellaneousLong-term investmentMiscellaneousOther General And Administrative ExpenseOther incomeInvestmentOther comprehensive income/(loss)Safe BulkersRepurchase of preferrred stockRepurchase of preferred stockDividends paid common sharesDividends paidDividends paidDividends paid preferred sharesPayments of Stock Issuance CostsAcquisition of long term investmentsAcquisition of long term investmentsPayment of deferred financing costsPayment of deferred financing costsPension and Retirment Benefit Obligations- CrewPlan Name [Axis]Plan Name [Domain]Preference shares par valuePreferred Shares, Dividend Rate PercentagePreferred Stock Dividends Per Share DeclaredPreferred Shares, Per Share Amounts Of Preferred Dividends In ArrearsPreferred Shares, Redemption DatePreferred Stock, Discount On SharesPreferred stock, $0.01 par value; 20,000,000 authorized, 1,569,526 Series B Preferred Shares and 1,600,000 Series B Preferred Shares, 2,300,000 Series C Preferred Shares, 3,200,000 Series D Preferred Shares, issued and outstanding at December 31, 2014 and 2015, respectivelyPreference shares issuedPreference shares authorizedPreferred Shares, Redemption Price Per ShareLess preferred dividendPreference shares outstandingEntity preferred shares outstandingPreferred StockPrepaid expenses and other current assetsPrivate PlacementMaturity of investmentProceeds on issuance of preferred stockProceeds from long-term debtProceeds from Issuance Initial Public OfferingProceeds on issuance of common stockProceeds from Sale of Productive AssetsProceeds from sale of assetsProfessional fees (legal and accounting)Property Plant And Equipment By Type [Axis]Net Book ValueVessels Net, Depreciation, Special Survey and Drydocking Costs, Repairs and MaintenanceProperty, Plant and Equipment [Abstract]Property, Plant and Equipment, Useful LifeProperty Plant And Equipment Type [Domain]Vessels, netNet Book Value, Beginning BalanceNet Book Value, Ending BalanceProperty, Plant and Equipment, GrossVessel Cost, Beginning BalanceVessel Cost,Ending BalanceSale of vessels and novation of newbuild contracts [Line Items]Vessel, NetTransfers from Advances for vessel acquisitions and vessel under constructionTransferred to vessel costVessel CostProvision for Doubtful AccountsInventory Type [Domain]Inventory [Axis]Range [Domain]Range [Axis]ReceivablesAmortization of time charter discountAmortization of time charter discountRelated Party Transactions DisclosureSupervision Fee, Description of Transaction-Management fee to related party-Management fee to related partyManagement fee - related partyFixed and Variable feesRelated Party TransactionsPrincipal payments of long-term debtPrincipal payments of long-term debtRestricted cashRestricted cashRestricted Cash And Cash Equivalents NoncurrentRetained EarningsRetained earningsREVENUES:Reducing revolving trancheSale Leaseback Transaction Name [Domain]Sale of Stock, Name of Transaction [Domain]Sale Leaseback Transaction Description [Axis]Scenario Unspecified [Domain]Location and amounts of fair value of derivatives not designed as hedging instrumentsFees pursuant to the Management Agreement, the Shipmanagement Agreements and the Supervision AgreementsBank Debt Borrowings ScheduleBank Debt Maturities ScheduleAcrrued Liabilities [Table Text Block]Acrrued LiabilitiesCharterers ConcentrationRevenues from External Customers by Products and Services [Table Text Block]RevenuesInterest rate derivatives scheduleSchedule Of Property Plant And Equipment [Table]Fair value of derivatives not designed as hedging instrumentsSchedule Of Stock By Class [Table]Gain or loss recognized on derivatives not designed as hedging instrumentsSchedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]Segment ReportingSeries D cumulative redeemable perpetual preferred sharesSeries C cumulative redeemable perpetual preferred sharesSeries B cumulative redeemable perpetual preferred sharesShare-based Compensation Arrangement by Share-based Payment Award, DescriptionShare based compensation expenseShare based compensationShare-based Compensation Arrangement by Share-based Payment Award [Line Items]Share PriceShare-based Compensation Arrangement by Share-based Payment Award, Shares Issued in PeriodSignificant Accounting PoliciesStatement [Line Items]Statement of Stockholders' Equity [Abstract]Statement Of Cash Flows AbstractStatement, Equity Components [Axis]Statement [Table]Statement Scenario [Axis]Statement of Financial Position [Abstract]Statement Class Of Stock [Axis]Repurchase program amountRepurchase of preferred stockRepurchase of preferred stockIssuance of common stockRepurchased sharesStock Issued During Period, Shares, New IssuesShare based compensationIssuance of preferred stockShare CapitalSHAREHOLDERS' EQUITY:Other Comprehensive Income/ (Loss) And DividendsBalanceBalanceTotal shareholders' equityTotal shareholders' equitySubsequent Event Type [Axis]Subsequent Event, DescriptionSubsequent Event [Line Items]Subsequent Event [Member]Dividend declarationSubsequent EventsSubsequent Events [Abstract]Subsequent Event Type [Domain]Subsequent Event [Table]Subsidiaries [Member]MarathassaSubsidiary or Equity Method Investee, Sale of Stock by Subsidiary or Equity Investee [Table]Supplemental cash flow information:Accounts ReceivableUnconditional Purchase Obligation, Category of Goods or Services Acquired [Domain]TotalUnrealized (gain)/loss on derivativesUnrealized gain on derivativesUnrecorded Unconditional Purchase Obligation, Due within One Year2016Unrecorded Unconditional Purchase ObligationTotalUnrecorded Unconditional Purchase Obligation Balance On Fourth Anniversary2019Unrecorded Unconditional Purchase Obligation [Line Items]Unrecorded Unconditional Purchase Obligation by Category of Item Purchased [Axis]Unrecorded Unconditional Purchase Obligation [Table]Unrecorded Unconditional Purchase Obligation, Due within Three Years2018Unrecorded Unconditional Purchase Obligation, Due within Two Years2017Use of EstimatesWeighted average number of shares, basic and dilutedAmendment descriptionAmendment flagCurrent fiscal year end dateDocument period end dateEntity [Domain]TotalEntity Incorporation, Date of IncorporationEntity Incorporation, State Country NameTrading symbolEntity well known seasoned issuerEntity voluntary filersEntity current reporting statusEntity filer categoryEntity public floatEntity registrant nameEntity central index keyEntity common stock shares outstandingDocument Period FocusDocument Fiscal Period FocusLegal Entity [Axis]Document TypeInvestment [Text Block]InvestmentInvestment Interest Rate TypeInvestment Maturity DateNotional Amount of DerivativesAdvances for vessel acquisitions and vessels under constructionAdvances For Assets Acquisitions And Assets Under ConstructionGross amount, at the balance sheet date, of long-lived assets under construction that include construction costs to date on capital projects that have not been completed and assets being constructed that are not ready to be placed into service and advances and costs paid for assets under acquisition that have not been completed and delivered and not ready to be placed into service as at the balance sheet date.Advances for vessel acquisition and vessels under construction, Beginning balanceAdvances for vessel acquisition and vessels under construction, Closing balanceTotal fixed assetsFixed Assets NetSum of the carrying amounts as of the balance sheet date of all tangible assets that are held by an entity for use in the production or supply of goods and services, for rental to others, or for administrative purposes and that are expected to provide economic benefit for more than one year; net of accumulated depreciation and gross amount, at the balance sheet date, of long-lived assets under construction that include construction costs to date on capital projects that have not been completed and assets being constructed that are not ready to be placed into service and advances and costs paid for assets under acquisition that have not been completed and delivered and not ready to be placed into service as at the balance sheet date.OTHER NON CURRENT ASSETS:Other Noncurrent Assets [Abstract]CommissionsCommissions (address and brokerage) reflect payments, made to third-party brokers or our charterers, directly related to our revenues from which they are deducted, regardless of charter type, deferred and amortized over the related charter period presented as a separate line item.CommissionsNet revenuesRevenues net of commissionsNet RevenuesRevenuesTime Charter And Voyage RevenueRevenues generated from charterers for the time or voyage charter hire of vessels.Revenues from time charter may also include ballast bonus, which is an amount paid by the charterer for repositioning the vessel at the charterers disposal, and other miscellaneous revenues from vessel operations.TotalVoyage expensesVoyage expenses include costs for draft surveys, hold cleaning, postage and other minor miscellaneous expenses related to the voyage such as the United States federal income tax that is paid in respect of our U.S. source shipping income (imposed on gross income without the allowance for any deductions).Voyage expenses-Public company expensesThe aggregate total of public company expenses incurred in relation to our operation as a public company such as professional fees, compensation paid to our directors and officers, listing fees and other miscellaneous expenses.-Public company expensesVessel acquisitions including advances for vessels under constructionThis element represents cash outflows associated with acquisition of vessels including advances paid for vessels under construction and capitalized expenses and interest.Vessel acquisitions including advances for vessels under constructionIncrease in bank time depositsGross cash outflow of time deposits.Increase in bank time depositsMaturity of bank time depositsGross cash inflow of time deposits.Repayment of advances to shareholdersRepayment of advances to shareholdersRepayment of advances to shareholdersAdvances from shareholdersAdvances From ShareholdersLoss On Asset Purchase Cancellations Net Of Interest EarnedLoss on asset purchase cancellations of newbuild contracts, consisting of advances forfeited plus expenses net of interest earned related to the cancellations.Loss on asset purchase cancellationLoss on asset purchase cancellationNotes To Consolidated Financial StatementsAdvances For Assets Acquisition And Assets Under Construction [Text Block]This element represents the disclosure for the gross amount of, advances for vessel acquisition and costs and advances paid for assets under construction that are not ready to be placed into service and that have not been completed and delivered including capitalized expenses and interest, asset cancellations and transfers to vessel cost.Advances For Assets Acquisitions And Assets Under ConstructionAssets Held For Sale [Text Block]The entire disclosure of long lived assets held for sale.Disclosure may include the description of the facts and circumstances leading to the expected disposal, manner and timing of disposal, the carrying value of the assets held for sale, the gain (loss) recognized in the income statement and the income statement caption that includes that gain (loss).Assets Held For SaleDeferred Finace Charges Net [Text Block]This element represents the disclosure for the amount of long-term deferred finance costs capitalized, additions, amortization expense and write-offs recorded durignt the reporting period.Deferred Finace Charges NetTime Charter And Voyage Revenue [Text Block]This element represents the dislcosure of revenues, ballast bonus and other miscellaneous revenues generated from charterers, for the charter hire of vessels.Time Charter And Voyage RevenueVessel Operating Expenses [Text Block]This element represents the disclosure of vessel operating expenses.Vessel Operating ExpensesAccrued Liabilities [Text Block]This is the entire disclosure of accrued liabilities.Accrued LiabilitiesGain Loss On Contract Termination [Text Block]This is the entire disclosure of gain/loss on contract termination.Gain Loss On Contract TerminationGain\Loss On Asset Purchase Cancellations [Text Block]This is the entire disclosure of the gain\loss on asset purchase cancellations.Gain On Asset Purchase CancellationsFuture Minimum Time Charters [Text Block]The entire disclosure regarding future minimum time charter revenue, net of commissions, based on vessels committed to non-cancelable time charters contracts, excluding the future acquisitions of vessels.Future Minimum Time ChartersGeneral And Administrative Expenses [Text Block]The entire disclosure of general and administrative expenses including management fees and expenses incurred for managing and administering the affairs of an entity.General And Administrative ExpensesUnearned Revenue Accrued Revenue [Text Block]The entire disclosure for uneard revenue and accrued revenue recognized by the company during the period.Unearned Revenue/Accrued RevenueGain On Sale Of Assets [Text Block]Disclosure of all information related to disposals. Disclosure may include methodology and assumptions, type of asset, asset classification, method of disposal, gain or loss on disposal net of tax, date of disposal.Gain On Sale Of AssetsDividends [Text Block]This is the disclosure for the declaration and payment of dividends.DividendsGeneral InformationSchedule Of Subsidiaries [Table Text Block]Schedule of SubsidiariesTabular disclosure of the subsidiaries included in the consolidated financial statements.Time Deposits Policy [Policy Text Block]Disclosure of accounting policy for time deposits that is held with banks.Time DepositsAdvances For Assets Acquisition And Assets Under ConstructionAdvances for Vessel Acquisition and Vessls under Construction [Table Text Block]Tabular disclosure of the gross amounts of long-lived assets under construction that includes construction costs, advances paid for vessels acquisition and vessels under construction, including capitalized expenses and interest, that have not been completed and delivered and not ready to be placed into service and transfers to vessels cost of vessels acquisitions and vessels under construction that have been completed and delivered and placed into service during the reporting period.Advances for Vessel Acquisition and Vessls under ConstructionRevenue And Related Expense Recognition Policy [Policy Text Block]Disclosure of accounting policy for revenue, related expenses and cost recognition. The disclosure also inlcudes the entity's treatment of unearned or deferred revenue, time charter revenues, ballast bonus, other miscellaneous revenues from vessel operations, vessel operating expenses and voyage expenses.Accounting for Revenues and Related ExpensesDeferred Finance Charges Net [Table Text Block]Deferred Finance Charges, NetTabular disclosure of the amounts of long-term deferred finance costs capitalized, amortized and writen off during the reporting period.Taxes Policy [Policy Text Block]TaxesDisclosure of accounting policy for TaxesCommitments Under Shipbuilding Contracts And Memorandums Of Agreement [Table Text Block]Tabular disclosure of the existing obligations and commitments under shipbuilding contracts and memorandums of agreement for the construction and acquisition of newbuild vessels as well as the settlement schedule of these commitments.Commitments under Shipbuilding Contracts and Memorandums of AgreementRevenues TablesOperating ExpenseVessel Operating Expenses [Table Text Block]Tabular disclosure of the amount and analysis of the components constituting the vessels operating expenses.Vessel Operating ExpensesSchedule of Vessels, NetSchedule Of Vessels Net [Table Text Block]Tabular disclosure of the rollforward of the value of long-lived, physical assets that are used in the normal conduct of business and not intended for resale.Fair Value Financial Instruments And Derivative InsturmentsEarly Redelivery Income NetEarly Redelivery Income NetEarly Redelivery Income Net [Table Text Block]Tabular disclosure of the components of early redelivery income, net.Early redelivery Income, NetFuture Minimum Time Charter RevenueFuture Minimum Time Charter RevenueFuture Minimum Rentals On Non Cancelable Leases [Table Text Block]Tabular disclosure of future minimum time charter revenue, net of commissions in the aggregate and for each of the five succeeding fiscal years and thereafter, for operating leases based on vessels committed to noncancelable time charter contracts having initial or remaining terms in excess of one year, exlcluding future vessels acquisitions.General And Administrative Expense [Table Text Block]Tabular disclosure of the components of general and administrative expenses.General And Administrative ExpenseDeferred Received In Advance And Unearned RevenueUnearned Revenue And Cash Received In Advance [Table Text Block]Tabular disclosure of the type of arrangements and the corresponding amounts that comprise the current and noncurrent balance of deferred and received in advance revenue as of the balance sheet date.Unearned Revenue And Cash Received In AdvanceNumber of subsidiariesNumber of subsidiaries owned by the entity.Number of subsidiaries owned by the entityNumber of drybulk vesselsNumber of drybulk vessels owned and operated as of period endNumber Of Newbuild VesselsNumber of newbuild vessels scheduled to be acquired as of period end.Entity Sale Of Stock [Axis]Different types of stock transactions and the different attributes of each transaction.Charterer 1 [Member]Represents the name of a significant customer as defined by the entity.Daiichi Chuo Kisen KaishaCharterer 2 [Member]Represents the name of a significant customer as defined by the entity.Kawasaki Kisen KaishaCharterer 3 [Member]Represents the name of a significant customer as defined by the entity.Oldendorff Gmbh and Co. KGSubsidiary [Table]Schedule reflecting a list with all the subsidiaries.Marindou [Member]MarindouPetra [Member]PetraPemer [Member]PemerFinished Interest Rate Swap [Member]Finished Interest Rate SwapLine Of Credit Facility Availability TermDecription of the terms for the availability of the credit facility.Subsequent Event Vessel Delivery [Member]Newbuild deliveryCredit Facility [Member]Credit facilityCommon Stock Dividends Per Share Cash Paid QuarterlyDividends paid quarterly for each share of common stock outstanding.Number Of Quarters Of Dividend PaymentsNumber of quarters during the current period on which the company declared and paid dividends.Gross Proceeds From Sale Of Property Plant And EquipmentThe gross cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.Commission And Other Sale Of Property Plant And Equipment Directly Related ExpensesCommissions and related fees paid by the Entity to representatives based on commission payout contracts covering the sale of an asset.Cash Received In Advance [Member]Cash received in advance of service providedVarying Charter Rates [Member]Deferred revenue resulting from varying charter ratesProperty Plant And Equipment Collateral For DebtThe carrying amount, as of the date of the latest financial statement presented, of vessels that are pledged as collateral to secure the related debt obligations.Estimated Offhire DaysThe estimated number of offhire days taken into consideration in arriving at the minimum future charter revenue.Contract CancellationContract Cancellation [Line Items]Accrued Interest Earned Related To Asset Puchase CancellationsAccrued interest earned related to asset puchase cancellations.Maxdeka [Member]MaxdekaMaxenteka [Member]MaxentekaAdvances Paid Capitalized Expenses And Interest And Accrued Vessel CostPayments of installments associated with acquisition of vessels including advances paid for vessels under construction and certain capitalized expenses, interest and accrued vessel cost.Advances paid, including capitalized expense and interestContract Termination [Line Items]Eniadefhi [Member]EniadefhiKerasies [Member]KerasiesPelea [Member]PeleaOther Minor subsidiaries [Member]Other Minor early redeliveriesCash Compensation Received On Contract Termination NetCash compensation received, net of commissions related to the termination of a contract between the parties.Early Delivery Income Recorded From Time Charter Contract TerminationEarly dilivery income recorded from time charter contract termination.Time Charter Daily Fixed RateTime carter daily fixed rateAccrued Revenue Recorded From Time Charter Contract TerminationAccrued revenue recorded from time charter contract termination.Accrued Vessel Operating And Voyage ExpensesCarrying value as of the balance sheet date of [accrued] vessel' operating and voyage expenses , that has been incurred and is unpaid. Used to reflect the current portion of the liabilities due within one year.Vessels' operating and voyage expensesAccured CommissionsThe carrying value as of the balance sheet date of accrued commissions (address and brokerage) that has been incurred and is unpaid.CommissionsAccrued Intesest On Derivatives And Other Financial ExpensesCarrying value as of the balance sheet date of [accrued] interest on derivatives payable on all forms of derivative instruments that has been incurred and is unpaid and carrying value as of the balance sheet date of the accrued other financial expenses.Interest on derivatives and other finance expensesAccured General And Administrative ExpenseCarrying value as of the balance sheet date of accrued expenses in the form of management fees in exchange of services and the accrued expenses for managing and administering the affairs of an entity, that has been incurred and is unpaid.General and administrative expensesMarinouki [Member]MarinoukiAvstes [Member]AvstesSoffive [Member]SoffiveEniaprohi [Member]EniaprohiStaloudi [Member]StaloudiMarathassa [Member]MarathassaMaxeikosiexi [Member]MaxeikosiexiMaxpente [Member]MaxpenteProceeds From Issuance Of Common Stock And Private PlacementsThe cash inflow from the additional capital contribution to the entity and the amount received from entity's raising of capital via private and public placement.March 2010 public offering [Member]March 2010 public offeringApril 2011 public offering [Member]April 2011 public offeringShare Based Compensation Value Of TransactionThe quarterly amount of non-cash, equity-based audit committee member remuneration.Audit Committee Chairman [Member]Audit Committee ChairmanIndipendent directors [Member]Independent directorsCost Of Property Repairs Maintenance And Drydocking CostsThe aggregate costs of keeping the property in good condition including the repairs, maintenance and drydocking costs.Repairs, maintenance and drydocking costsCost Of LubricantsLubricant costs incurred that are directly related to goods produced and sold and services rendered during the reporting period.LubricantsTime charter revenueRevenues generated from charterers for the time charter hire of vessels which implies a contract made for the use of a vessel for a specific period of time and at a specified daily charter rate.Ballast bonusRevenues generated from ballast bonus, which is an amount paid by the charterer for repositioning the vessel at the charterers disposal.Insurance Maximum AmountThe maximum amount of the liabilities associated with the individual vessel actions, mainly for sea pollution covered by P&I Club insurance.Due To Shipyards Sellers [Member]Due To Shipyards SellersDue To Manager [Member]Due To ManagerShikoku [Member]ShikokuNumber Of Loan Agrrements With Restrictive Liquidity CovenantNumber of loan agrrements with restrictive liquidity covenantNumber Of Loan And Credit Facility Agrrements With Restrictive Liquidity CovenantNumber Of Loan And Credit Facility Agrrements With Restrictive Liquidity CovenantMininum cash balance of loan with restrictive liquidity covenantMininum cash balance of loan with restrictive liquidity covenantMininum cash balance of loan and credit facility agrrements as collateral deposit with restrictive liquidity covenantMininum cash balance of loan and credit facility agrrements as collateral deposit with restrictive liquidity covenantConsolidated Leverage CovenantRepresent the maximum percentage of total consolidated liabilities divided by its total consolidated assets, as the case may be with the relevant bank.The total consolidated assets are based on the fair market value of its vessels and the book values of all other assets, on an adjusted basis as set out in the relevant guarantee;Ebitda To Interest CovenantRepresent tha minimum ratio for EBITDA to consolidated interest expenses applicable on a trailing 12 months basis (EBITDA To Interest Covenant).Net Worth CovenantRepresents the minimum amount of consolidated net worth (total consolidated assets less total consolidated liabilities) (Consolidated Net Worth Covenant) with the relevant bank;Mininum Free Liquidity On DepositRepresent the amount of minimum free liquidity required on deposit with the relevant lender on a per vessel basis.Number Of Vessels Requiring Minimum Free LiquidityNumber of vessels requiring minimum free liquidity.Minimum Percentage Of OwnershipRepresents the minimum percentage of shares that remain directly or indirectly benefially owned by the Hajioannou family for the duration of the relevant credit facilities.Percentage Of Ownership In SubsidiariesPercentage Of Ownership In SubsidiariesNumber Of MoasNumber of Memorandums of Agreement(MoA)Number Of Shipbuilding ContractsNumber of shipbuilding contractsManagement Agreement Fixed Fee Per Day Per VesselA fixed fee payable to the Manager, per vessel calculated proportionally to the number of ownership days.Fixed FeeSupervision Agreement On Site Fee Per Newbuild VesselSupervision fee payable to the Manager, in exchange for on-site supervision services with respect to all new builds, of which 50% is payable upon the signing of the relevant Supervision Agreement, and 50% upon successful completion of the sea trials of each new build.Supervision FeeManagement Agreement Percentage Fee On Gross RevenuesA variable fee payable to the Manager, calculated on gross freight, charter hire, ballast bonus and demurage.Variable FeeInvestment Interest Rate MarginFloating Rate Note interest rate margingLine Of Credit Facility, Maximum Borrowing Capacity PercentageMaximum percentage of borrowing capacity under credit facility.Line of Floating Rate Note, Maximum Borrowing Capacity PercentageMaximum percentage of borrowing capacity under floating rate note.Line Of Credit Facility Repayment PeriodThe repayment duration of the credit facility.Line Of Credit Facility Duration First Required PaymentDescription of the duration afther which the first payment under the line of credit must be paid.Document Information [Abstract]Entity Information [Abstract]Other Expense Income On Derivates [Member]Other (Expense)/Income- Gain/(Loss) on DerivativesMaxeikosi [Member]MaxeikosiEptaprohi [Member]EptaprohiMaxeikosiena [Member]MaxeikosienaMaxdekatria [Member]MaxdekatriaMaxeikositessera [Member]MaxeikositesseraLoan1 [Member]Terminated loan agreementLoan2 [Member]Current loan agreement 1March 2012 Public Offering [Member]March 2012 public offeringNumber Of Second Hand VesselsNumber of second hand vessels scheduled to be acquired as of period end.Loss or gain on asset purchase cancellations of newbuild contracts, loss consisting of advances forfeited plus expenses related to the cancellations and gain consisting of accrued interest income earned on the advances paid, net of capitalized expenses.Gain on asset purchase cancellation(Loss) Gain on asset purchase cancellationsGain on asset purchase cancellationInstallments Paid For Vessel ConsructionThe amount of the installments paid for vessel construction under the shipbuilding contract.Interest and expenses capitalizedAmount of interest and expense capitalized during the period.Accrued Revenue [Abstract]Accrued revenue currentAccrued revenue results from straight-line revenue recognition in respect of charter agreements that provide for varying charter rates and it is expected to be realized in the next 12 months.Resulting from revenue earned prior to cash being received - Current assetAccrued revenueAccrued Revenue NoncurentAccrued revenue results from straight-line revenue recognition in respect of charter agreements that provide for varying charter rates and it is expected to be realized in more than 12 months.Resulting from varying charter rates - Non Current assetAccrued revenueSchedule of accounts receivable [Table Text Block]Tabular disclosure of the various type of trade and other accounts receivables and for each the net carrying value as of the balance sheet date.Schedule of Accounts ReceivableNumber of additional public common stock offeringsNumber of successfully completed public common stock offerings.Management Agreement Percentage Fee On SaleA sales fee calculated on the contract price for each vessel sold, payable to the Manager upon the conclusion of the vessel sale in exchange for services provided in relation to a sale of a vessel.Sales FeeManagement Agreement Percentage Fee On AcquisitionA acquisition fee calculated on the contract price of each vessel constructed or purchased, payable to the Manager upon the conclusion of the vessel acquisition in exchange for services provided in relation to an acquisition of a vessel.Acquisition FeeSupervision fees expenseThe amount of expense derived from the supervision fees.Supervision FeesSales fees expenseSales FeesAmount of expense derived from the sales fee.Acquisition fees expenseAmount of expense derived from the acquisition fee.Acquisition FeesSchedule of Related Party Transactions Basis [Table Text Block]Tabular disclosure of percentages and fees that form the basis of the related party transactions.Schedule of Related Party Transactions BasisVessel CapacityThe element is the maximum weight (mass) of a ship when loaded up to its summer load line and is the sum of the weights of the cargo, crew, fuel, passengers, and stores.The Memorandum of Agreement (MOA) contract vessel purchase priceVessel Purchase PriceMemorandum Of Agreement Vessel Purchase PriceContract cancellation [Table]Contract for Hull No J0131 [Member]Contract for Hull No J0131Assets purchase cancelationAmount of advances paid under the shipbuilding contract during the period plus capitalized expenses until the time of the contract cancellation of Hull No J0131.Assets purchase cancelationEbitda After Deducting Cash CovenantRepresent tha maximum ratio of aggregate debt to EBITDA from which cash was excluded on a trailing 12 months basis (EBITDA After Deducting Cash Covenant).Current assets [Member]Current assetsNoncurrent assets [Member]Noncurrent assetsCurrent liabilities [Member]Current liabilitiesNoncurrent liabilities [Member]Noncurrent liabilitiesDelivery For Lake Despina Vessel[Member]Lake DespinaDelivery For Kypros Bravery Vessel [Member]Kypros BraveryCharter Contract PeriodThe period over which the vessel is going to be chartered to the charterer.Vessel acquisition [Abstract]Vessel acquisitionAdvances Paid Under Memorandum of Agreement On Signing DateAdvances paid under memorandum of agreement(MoA) on signing date.Advances To Be Paid Under Memorandum of Agreement On Delivery DateAdvances to be paid under Memorandum of Agreement(MOA) on the date of delivery.Cancellation Of Contract [Axis]Cancellation Of Contract [Domain]Vessel Delivery [Axis]Vessel Delivery [Domain]Glovertwo [Member]GlovertwoJune 2013 Public Offering [Member]June 2013 public offeringNovember 2013 Public Offering [Member]November 2013 public offeringCredit facility June 2014 2 [Member]Credit facility June 2014 to finance part of the purchase prices of Hull 828, Hull 835 and Hull 1718Preferred Stock Dividends Per Share Cash Paid QuarterlyDividends paid quarterly for each share of preferred stock outstanding.Credit facility entry period [Axis]Credit facility entry period [Domain]Credit Facility June 2014 1 [Member]Credit facility June 2014 to finance part of the purchase prices of Hull 1148 and Hull 1686Interest rate percentage on advances paidInterest rate percentage on the advances paid computed from the respective dates of the Company's advances in relation to the Shipbuilding contract of Hull J0131Number of additional public preferred stock offeringsNumber of successfully completed public preferred stock offerings.Charter Revenues [Member]Charter RevenuesVoyage charter revenueRevenues generated from voyage charter hire of vessels which implies a contract made for the use of a vessel under which freight is paid on the basis of moving cargo from a loading port to a discharge port.Credit Facility July 2014 [Member]Credit facility July 2014 to finance part of the purchase prices of Hull 1685, Hull 1146, Hull 1551 and Hull 1552Term loan November 2014 [Member]Term loan November 2014 to finance part of the purchase price of Hull 1689May 2014 Public Offering [Member]May 2014 public offeringJune 2014 Public Offering [Member]June 2014 public offeringConsolidated Debt ConvenantThe maximum amount of consolidated debt outstanding on year end.Gloverthree [Member]GloverthreeShikokutessera [Member]ShikokutesseraVassone [Member]VassoneShikokupente [Member]ShikokupenteMaxtessera [Member]MaxtesseraPayments Of Common Stock Issuance CostsThe cash outflow for cost incurred directly with the issuance of common stock.Payment of common stock offering expensesPayments Of Preferred Stock Issuance CostsThe cash outflow for cost incurred directly with the issuance of preferred stock.Payment of preferred stock offering expensesProceeds from issuance of common stock net of offering expenseThe cash inflow from the additional capital contribution to the entity net of offering expenses.Proceeds on issuance of common stock, netProceeds From Issuance Of Preferred Stock Net Of Offering ExpensesProceeds from issuance of capital stock which provides for a specific dividend that is paid to the shareholders before any dividends to common stockholders and which takes precedence over common stockholders in the event of liquidation, net of offering expenses.Proceeds on issuance of preferred stock, netProceeds From Advances And Interest For Assets CanceledThe cash inflow representing the full amount of advances paid and interest on those advances until the refund.Proceeds from the asset purchase cancellationAll Debt Instruments [Member]All loans and credit facilitiesAll loand and credit facilities owned by the company.Novated Interest Rate Swaps [Member]Novated Interest Rate SwapsPreferred Shares Conditions For Dividend Rate IncreaseThe description of increase in base dividend rate following the fail to comply with specific covenants, default on any of its credit facilities, dividend payment default or failure to redeem.Deferred Finance Costs Noncurrent Net For Unutilized Debt InstrumentNet amount of long-term deferred finance costs capitalized at the end of the reporting period until the date of the utilization of the respective loan and credit facility.Deferred financing costsLong Term Debt Current NetAmount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.Current portion of long-term debt, netLess: Current portion of long-term debt, net of current portion of deferred financing costsLong-term debt, net of deferrred financing costs, non-currentAmount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.Long-term debt, netLiabilities Of Disposal Group Including Discontinued Operation Current Net Of Deferrred Finance CostsAmount classified as liabilities less the deferred finance costs attributable to disposal group held for sale or disposed of, expected to be disposed of within one year or the normal operating cycle, if longer.Liability directly associated with assets held for sale, netLess: Liability directly associated with assets held for sale, netDisposal Group Including Discontinued Operation Deferred Finance CostsAmount classified as deferred finance costs attributable to disposal group held for sale or disposed of.Deferred financing costs directly associated with assets held for saleLong Term Debt NetAmount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.Total debt, net of deferred financing costsImpairment Of Property Plant And Equipment To Be Disposed OfThe aggregate amount of write-downs for impairments, reprezenting the difference between the carrying amount and fair value less cost to sell, recognized during the period for property, plant and equipment for abandonment, exchange or sale.Impairment lossLossProperty Plant And Equipment Gross Transfers To Assets Held For SaleAmount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and intended for resale.Transfer to Assets held for saleProperty Plant And Equipment Accumulated Depreciation TransfersTo Assets Held For SaleAmount of accumulated depreciation, depletion and amortization for physical assets intended for resale.Transfer to Assets held for saleProperty Plant And Equipment Net Transfers To Assets Held For SaleAmount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and intended for resale.Transfer to Assets held for saleImpairment Of Advances For Vessel Under Construction To Be Disposed OfThe aggregate amount of write-downs for impairments recognized during the period for advances for vessels under construction for novation, abandonment, exchange or sale.Impairment lossVessel Agreed Sale PriceThe agreed sale price which the buyers will pay and which represents the higher of the two appraisals for that vessel obtained from independent third parties.Remaining Commitment For New buildAmount of the remaining commitment maturing in the remainder of the fiscal years in order to complete a newbuild vessel as of the day of signing the novation agreement.Maritime Equipment 2 [Member]Kypros UnityFair Value Of Commitment For NewbuildThe fair value of a newbuild vessel representing the higher of the two appraisals obtained from independent third parties.Charterer 4 [Member]Global Chartering LtdShikokuokto [Member]ShikokuoktoMaxeikositria [Member]MaxeikositriaYoungone [Member]YoungoneLoan3 [Member]Current loan agreement 2Maxpente Maxeikositessera Maxenteka [Member]Maxpente, Maxeikositessera, MaxentekaBunkers [Member]BunkersLubricants [Member]LubricantsPrepayments Of Short Term DebtThe cash outflow resulting from the prepayment notice for the full prepayment of the loan facilities having an initial maturity due after one year.Prepayment noticeCurrent portion of long-term debt net [Member]Current portion of long-term debt, netLoan facility [Member]Loan facilitySale and leaseback periodThe maxim duration of the sale and leaseback contract.Sale Leaseback Transaction Daily Rental PaymentsThe amount of the daily bareboat charter rate due under the bareboat charter entered into in connection with the transactions involving the sale of property to another party and the lease of the property back to the seller.Daily bareboat charter rateSale Leaseback Transaction Purchase PriceThe aggregated amount, representing the purchase obligation for the vessels, the seller has to pay to purchasing party at the end of the sale and leaseback period.Purchase aggregated priceSale and leaseback agreement [Member]Sale and leaseback agreementEffect of novation contracts [Member]Represents the reduction of commitments under shipbuiliding contracts due to novation of contracts.Effect of novation of Hull 1718 and 1552Loan facility secured by Torodos Sun [Member]Loan facility secured by Torodos SunDocument and Entity information [Abstract]